// index.js
// const app = getApp()
const { envList } = require('../../../envList.js');
const api = require('../../../api')
import { request } from '../../../util'

Page({
  data: {
     purchaseData:{},
     isupdate:false,
     show:false,
     show2:false,
     show3:false,
     sellSignature:false,
     selDate: new Date().getTime(),
     minDate:new Date().getTime(),
     formatter(type, value) {
      if (type === 'year') {
        return `${value}年`
      }
      if (type === 'month') {
        return `${value}月`
      }
      return value
    },
    cascaderValue:"",
    options:[
      {
        text: '浙江省',
        value: '330000',
        children: [{ text: '杭州市', value: '330100' }],
      },
      {
        text: '江苏省',
        value: '320000',
        children: [{ text: '南京市', value: '320100' }],
      },
    ],
    fieldNames:{
      text:"vegetables",
      value:"vegetablesId"
    },

     // 签名数据
    canvasName: 'handWriting',
    ctx: '',
    canvasWidth: 0,
    canvasHeight: 0,
    transparent: 1, // 透明度
    selectColor: 'black',
    lineColor: '#1A1A1A', // 颜色
    lineSize: 1.5,  // 笔记倍数
    lineMin: 0.5,   // 最小笔画半径
    lineMax: 4,     // 最大笔画半径
    pressure: 1,     // 默认压力
    smoothness: 60,  //顺滑度，用60的距离来计算速度
    currentPoint: {},
    currentLine: [],  // 当前线条
    firstTouch: true, // 第一次触发
    radius: 1, //画圆的半径
    cutArea: { top: 0, right: 0, bottom: 0, left: 0 }, //裁剪区域
    bethelPoint: [],  //保存所有线条 生成的贝塞尔点；
    lastPoint: 0,
    chirography: [], //笔迹
    currentChirography: {}, //当前笔迹
    linePrack: [], //划线轨迹 , 生成线条的实际点
    issellQM: false,  //是否出售人签名
    currentActive:0,
    checkData:[]
  },
  onLoad(options){
    let canvasName = this.data.canvasName
     let ctx = wx.createCanvasContext(canvasName)
     this.setData({
       ctx: ctx,
       purchaseData:JSON.parse(options.purchaseData),
      isupdate:options.isupdate
     })
     var query = wx.createSelectorQuery();
     query.select('.handCenter').boundingClientRect(rect => {
       this.setData({
         canvasWidth: rect.width,
         canvasHeight: rect.height
       })
     }).exec();
  },
  viewQmImg(){
    wx.previewImage({ 
      //current:this.data.purchaseData.purchaseSignature,
      current:this.data.purchaseData.purchaseSignature,
      urls:[
        this.data.purchaseData.purchaseSignature
      ],
      success:function(res){
        console.log(res)
      }
     })
  },
  checkVage(){
    var that = this;
    request(api.vagedata,{},"get").then(function(res){
        console.log(res);
        that.setData({
          options:res.data.data,
          show3:true
        })
    })
  },
  changeVage(e){
     var data = e.detail.selectedOptions[0];
     this.setData({
       "purchaseData.vegetables":data.vegetables,
       "purchaseData.vageId":data.vegetablesId,
       show3:false
     })
     console.log(e);
     console.log(this.data.purchaseData);
  },
  validator(v) {
    return /^(\d+)(\.\d{1,2})?$/.test(v.toString()); //只能输入两个小数
  },
  viewQmImg2(){
    wx.previewImage({ 
      //current:this.data.purchaseData.purchaseSignature,
      current:this.data.purchaseData.purchaseSellSignature,
      urls:[
        this.data.purchaseData.purchaseSellSignature
      ],
      success:function(res){
        console.log(res)
      }
     })
  },
  signature(){
    this.setData({
      show:true,
      issellQM:false
    })
  },
  signature2(){
    this.setData({
      show:true,
      issellQM:true
    })
  },
  onChange(e){
    console.log(e);
    this.setData({
      'purchaseData.purchaseDate': e.detail
    })
  },
  onChange2(e){
    console.log(e);
    this.setData({
      'purchaseData.vegetables': e.detail
    })
  },
  onChange3(e){
    console.log(e);
    this.setData({
      'purchaseData.purchasePlace': e.detail
    })
  },
  onChange4(e){
    console.log(e);
    this.setData({
      'purchaseData.purchaseMoney': e.detail
    })
  },
  onChange5(e){
    console.log(e);
    this.setData({
      'purchaseData.purchaseDeposit': e.detail
    })
  },
  onChange6(e){
    console.log(e);
    this.setData({
      'purchaseData.purchaseNum': e.detail
    })
  },
  onChange7(e){
    console.log(e);
    this.setData({
      'purchaseData.purchasePhone': e.detail
    })
  },
  sureUpdate(){
    //确认修改订单
    console.log(this.data.purchaseData)
    var that = this;
    request(api.updatepUrchases,{"json":JSON.stringify(this.data.purchaseData)},"post").then(function(res){
         console.log(res);
         if(res.code==200){
          wx.showToast({
            title: '操作成功',
            icon: 'success',
            duration: 2000//持续的时间
          })
          that.setData({
            purchaseData:res.data
          })
         }else{
          Notify({ type: 'danger', message: res.msg })
         }
    })

  },

 // 笔迹开始
uploadScaleStart (e) {
  if (e.type != 'touchstart') return false;
  let ctx = this.data.ctx;
  ctx.setFillStyle(this.data.lineColor);  // 初始线条设置颜色
  ctx.setGlobalAlpha(this.data.transparent);  // 设置半透明
  let currentPoint = {
    x: e.touches[0].x,
    y: e.touches[0].y
  }
  let currentLine = this.data.currentLine;
  currentLine.unshift({
    time: new Date().getTime(),
    dis: 0,
    x: currentPoint.x,
    y: currentPoint.y
  })
  this.setData({
    currentPoint,
    // currentLine
  })
  if (this.data.firstTouch) {
    this.setData({
      cutArea: { top: currentPoint.y, right: currentPoint.x, bottom: currentPoint.y, left: currentPoint.x },
      firstTouch: false
    })
  }
  this.pointToLine(currentLine);
},
// 笔迹移动
uploadScaleMove (e) {
  if (e.type != 'touchmove') return false;
  if (e.cancelable) {
    // 判断默认行为是否已经被禁用
    if (!e.defaultPrevented) {
      e.preventDefault();
    }
  }
  let point = {
    x: e.touches[0].x,
    y: e.touches[0].y
  }

  //测试裁剪
  if (point.y < this.data.cutArea.top) {
    this.data.cutArea.top = point.y;
  }
  if (point.y < 0) this.data.cutArea.top = 0;

  if (point.x > this.data.cutArea.right) {
    this.data.cutArea.right = point.x;
  }
  if (this.data.canvasWidth - point.x <= 0) {
    this.data.cutArea.right = this.data.canvasWidth;
  }
  if (point.y > this.data.cutArea.bottom) {
    this.data.cutArea.bottom = point.y;
  }
  if (this.data.canvasHeight - point.y <= 0) {
    this.data.cutArea.bottom = this.data.canvasHeight;
  }
  if (point.x < this.data.cutArea.left) {
    this.data.cutArea.left = point.x;
  }
  if (point.x < 0) this.data.cutArea.left = 0;

  this.setData({
    lastPoint: this.data.currentPoint,
    currentPoint: point
  })
  let currentLine = this.data.currentLine
  currentLine.unshift({
    time: new Date().getTime(),
    dis: this.distance(this.data.currentPoint, this.data.lastPoint),
    x: point.x,
    y: point.y
  })
  // this.setData({
  //   currentLine
  // })

  this.pointToLine(currentLine);
},
// 笔迹结束
uploadScaleEnd (e) {
  if (e.type != 'touchend') return 0;
  let point = {
    x: e.changedTouches[0].x,
    y: e.changedTouches[0].y
  }
  this.setData({
    lastPoint: this.data.currentPoint,
    currentPoint: point
  })
  let currentLine = this.data.currentLine
  currentLine.unshift({
    time: new Date().getTime(),
    dis: this.distance(this.data.currentPoint, this.data.lastPoint),
    x: point.x,
    y: point.y
  })
  // this.setData({
  //   currentLine
  // })
  if (currentLine.length > 2) {
    var info = (currentLine[0].time - currentLine[currentLine.length - 1].time) / currentLine.length;
    //$("#info").text(info.toFixed(2));
  }
  //一笔结束，保存笔迹的坐标点，清空，当前笔迹
  //增加判断是否在手写区域；
  this.pointToLine(currentLine);
  var currentChirography = {
    lineSize: this.data.lineSize,
    lineColor: this.data.lineColor
  };
  var chirography = this.data.chirography
  chirography.unshift(currentChirography);
  this.setData({
    chirography
  })
  var linePrack = this.data.linePrack
  linePrack.unshift(this.data.currentLine);
  this.setData({
    linePrack,
    currentLine: []
  })
  //console.log(this.data.linePrack)
},
retDraw () {
  this.data.ctx.clearRect(0, 0, 700, 730)
  this.data.ctx.draw()
},

//画两点之间的线条；参数为:line，会绘制最近的开始的两个点；
pointToLine (line) {
  this.calcBethelLine(line);
  return;
},
//计算插值的方式；
calcBethelLine (line) {
  if (line.length <= 1) {
    line[0].r = this.data.radius;
    return;
  }
  let x0, x1, x2, y0, y1, y2, r0, r1, r2, len, lastRadius, dis = 0, time = 0, curveValue = 0.5;
  if (line.length <= 2) {
    x0 = line[1].x
    y0 = line[1].y
    x2 = line[1].x + (line[0].x - line[1].x) * curveValue;
    y2 = line[1].y + (line[0].y - line[1].y) * curveValue;
    //x2 = line[1].x;
    //y2 = line[1].y;
    x1 = x0 + (x2 - x0) * curveValue;
    y1 = y0 + (y2 - y0) * curveValue;;

  } else {
    x0 = line[2].x + (line[1].x - line[2].x) * curveValue;
    y0 = line[2].y + (line[1].y - line[2].y) * curveValue;
    x1 = line[1].x;
    y1 = line[1].y;
    x2 = x1 + (line[0].x - x1) * curveValue;
    y2 = y1 + (line[0].y - y1) * curveValue;
  }
  //从计算公式看，三个点分别是(x0,y0),(x1,y1),(x2,y2) ；(x1,y1)这个是控制点，控制点不会落在曲线上；实际上，这个点还会手写获取的实际点，却落在曲线上
  len = this.distance({ x: x2, y: y2 }, { x: x0, y: y0 });
  lastRadius = this.data.radius;
  for (let n = 0; n < line.length - 1; n++) {
    dis += line[n].dis;
    time += line[n].time - line[n + 1].time;
    if (dis > this.data.smoothness) break;
  }
  this.setData({
    radius: Math.min(time / len * this.data.pressure + this.data.lineMin, this.data.lineMax) * this.data.lineSize
  });
  line[0].r = this.data.radius;
  //计算笔迹半径；
  if (line.length <= 2) {
    r0 = (lastRadius + this.data.radius) / 2;
    r1 = r0;
    r2 = r1;
    //return;
  } else {
    r0 = (line[2].r + line[1].r) / 2;
    r1 = line[1].r;
    r2 = (line[1].r + line[0].r) / 2;
  }
  let n = 5;
  let point = [];
  for (let i = 0; i < n; i++) {
    let t = i / (n - 1);
    let x = (1 - t) * (1 - t) * x0 + 2 * t * (1 - t) * x1 + t * t * x2;
    let y = (1 - t) * (1 - t) * y0 + 2 * t * (1 - t) * y1 + t * t * y2;
    let r = lastRadius + (this.data.radius - lastRadius) / n * i;
    point.push({ x: x, y: y, r: r });
    if (point.length == 3) {
      let a = this.ctaCalc(point[0].x, point[0].y, point[0].r, point[1].x, point[1].y, point[1].r, point[2].x, point[2].y, point[2].r);
      a[0].color = this.data.lineColor;
      // let bethelPoint = this.data.bethelPoint;
      // console.log(a)
      // console.log(this.data.bethelPoint)
      // bethelPoint = bethelPoint.push(a);
      this.bethelDraw(a, 1);
      point = [{ x: x, y: y, r: r }];
    }
  }
  this.setData({
    currentLine: line
  })
},
//求两点之间距离
distance (a, b) {
  let x = b.x - a.x;
  let y = b.y - a.y;
  return Math.sqrt(x * x + y * y);
},
ctaCalc (x0, y0, r0, x1, y1, r1, x2, y2, r2) {
  let a = [], vx01, vy01, norm, n_x0, n_y0, vx21, vy21, n_x2, n_y2;
  vx01 = x1 - x0;
  vy01 = y1 - y0;
  norm = Math.sqrt(vx01 * vx01 + vy01 * vy01 + 0.0001) * 2;
  vx01 = vx01 / norm * r0;
  vy01 = vy01 / norm * r0;
  n_x0 = vy01;
  n_y0 = -vx01;
  vx21 = x1 - x2;
  vy21 = y1 - y2;
  norm = Math.sqrt(vx21 * vx21 + vy21 * vy21 + 0.0001) * 2;
  vx21 = vx21 / norm * r2;
  vy21 = vy21 / norm * r2;
  n_x2 = -vy21;
  n_y2 = vx21;
  a.push({ mx: x0 + n_x0, my: y0 + n_y0, color: "#1A1A1A" });
  a.push({ c1x: x1 + n_x0, c1y: y1 + n_y0, c2x: x1 + n_x2, c2y: y1 + n_y2, ex: x2 + n_x2, ey: y2 + n_y2 });
  a.push({ c1x: x2 + n_x2 - vx21, c1y: y2 + n_y2 - vy21, c2x: x2 - n_x2 - vx21, c2y: y2 - n_y2 - vy21, ex: x2 - n_x2, ey: y2 - n_y2 });
  a.push({ c1x: x1 - n_x2, c1y: y1 - n_y2, c2x: x1 - n_x0, c2y: y1 - n_y0, ex: x0 - n_x0, ey: y0 - n_y0 });
  a.push({ c1x: x0 - n_x0 - vx01, c1y: y0 - n_y0 - vy01, c2x: x0 + n_x0 - vx01, c2y: y0 + n_y0 - vy01, ex: x0 + n_x0, ey: y0 + n_y0 });
  a[0].mx = a[0].mx.toFixed(1);
  a[0].mx = parseFloat(a[0].mx);
  a[0].my = a[0].my.toFixed(1);
  a[0].my = parseFloat(a[0].my);
  for (let i = 1; i < a.length; i++) {
    a[i].c1x = a[i].c1x.toFixed(1);
    a[i].c1x = parseFloat(a[i].c1x);
    a[i].c1y = a[i].c1y.toFixed(1);
    a[i].c1y = parseFloat(a[i].c1y);
    a[i].c2x = a[i].c2x.toFixed(1);
    a[i].c2x = parseFloat(a[i].c2x);
    a[i].c2y = a[i].c2y.toFixed(1);
    a[i].c2y = parseFloat(a[i].c2y);
    a[i].ex = a[i].ex.toFixed(1);
    a[i].ex = parseFloat(a[i].ex);
    a[i].ey = a[i].ey.toFixed(1);
    a[i].ey = parseFloat(a[i].ey);
  }
  return a;
},
bethelDraw (point, is_fill, color) {
  let ctx = this.data.ctx;
  ctx.beginPath();
  ctx.moveTo(point[0].mx, point[0].my);
  if (undefined != color) {
    ctx.setFillStyle(color);
    ctx.setStrokeStyle(color);
  } else {
    ctx.setFillStyle(point[0].color);
    ctx.setStrokeStyle(point[0].color);
  }
  for (let i = 1; i < point.length; i++) {
    ctx.bezierCurveTo(point[i].c1x, point[i].c1y, point[i].c2x, point[i].c2y, point[i].ex, point[i].ey);
  }
  ctx.stroke();
  if (undefined != is_fill) {
    ctx.fill(); //填充图形 ( 后绘制的图形会覆盖前面的图形, 绘制时注意先后顺序 )
  }
  ctx.draw(true)
},
selectColorEvent (event) {
  console.log(event)
  var color = event.currentTarget.dataset.colorValue;
  var colorSelected = event.currentTarget.dataset.color;
  this.setData({
    selectColor: colorSelected,
    lineColor: color
  })
},
//设置canvas背景色  不设置  导出的canvas的背景为透明 
    //@params：字符串  color
    setCanvasBg(color){
 
      console.log(999);
      /* 将canvas背景设置为 白底，不设置  导出的canvas的背景为透明 */
      //rect() 参数说明  矩形路径左上角的横坐标，左上角的纵坐标, 矩形路径的宽度, 矩形路径的高度
      //这里是 canvasHeight - 4 是因为下边盖住边框了，所以手动减了写
      this.data.ctx.rect(0, 0, this.data.canvasWidth, this.data.canvasHeight - 4);  
      // ctx.setFillStyle('red')
      this.data.ctx.setFillStyle( color )
      this.data.ctx.fill()  //设置填充
      this.data.ctx.draw()    //开画
  },
  retDraw() {
    this.data.ctx.clearRect(0, 0, 700, 730)
    this.data.ctx.draw();
 
    //设置canvas背景
    this.setCanvasBg("#fff");
  },
  rebackCanvas(){
    this.setData({
      show:false
    })
    this.data.ctx.clearRect(0, 0, 700, 730)
    this.data.ctx.draw();
  },
  //保存到相册
  saveCanvasAsImg(){
    var that = this;
    //微信调用保存
    wx.canvasToTempFilePath({
        canvasId: 'handWriting',
        fileType: 'png',
        quality: 1, //图片质量
        success(res) {
            wx.uploadFile({
              url:api.saveQm,
              filePath:res.tempFilePath,
              name: 'file',
              success(res){
                var data = JSON.parse(res.data)
                if (that.data.issellQM) {
                    //出售人签名
                    that.setData({
                      "purchaseData.purchaseSellSignature":data.data.imgUrl,
                      "show":false
                    })
                }else{
                    //采购人签名 
                    that.setData({
                      "purchaseData.purchaseSignature":data.data.imgUrl,
                      "show":false
                    })
                }
              }
            })
        }
    })
},
//预览
previewCanvasImg(){
  wx.canvasToTempFilePath({
      canvasId: 'handWriting',
      fileType: 'jpg',
      quality: 1, //图片质量
      success(res) {
          // console.log(res.tempFilePath, 'canvas生成图片地址');
          wx.previewImage({
              urls: [res.tempFilePath], //预览图片 数组
          })
      }
  })
},
//上传
uploadCanvasImg() {
 
  wx.canvasToTempFilePath({
      canvasId: 'handWriting',
      fileType: 'png',
      quality: 1, //图片质量
      success(res) {
          // console.log(res.tempFilePath, 'canvas生成图片地址');
          //上传
          wx.uploadFile({
              url: 'https://example.weixin.qq.com/upload', // 仅为示例，非真实的接口地址
              filePath: res.tempFilePath,
              name: 'file_signature',
              formData: {
                  user: 'test'
              },
              success(res) {
                  const data = res.data
                  // do something
              }
          })
      }
  })
},
checkDate(){
   this.setData({
    show2:true
   })
},
onClose() {
  this.setData({ show2: false })
},
cancelData(){
  this.setData({ show2: false })
},
confirmData(event){
  let selData = new Date(event.detail).toLocaleDateString()
  this.setData({
    'purchaseData.purchaseDate': this.dataToStr(selData)
  })
},
//日期格式转字符窜
dataToStr(selData) {
  let selDataArr = selData.split('/')
  let strArr = selDataArr.map(function (value) {
    if (value.length == 1) {
      value = 0 + value
    }
    return value
  })

  return strArr.join('-')
},
onFinish(e) {
  const { selectedOptions, value } = e.detail;
  const fieldValue = selectedOptions
      .map((option) => option.text || option.name)
      .join('/');
  this.setData({
    fieldValue,
    cascaderValue: value,
  })
},
onCloseVage() {
  this.setData({
    show3: false,
  });
}
});
